SOFTWARE-CONTROLLABLE SYMMETRICAL VECTORIAL PERMANENT 4X4 SYSTEM FOR CARS WITH CONTINUOUSLY VARIABLE SPEED TRANSFER DIFFERENTIALS, WITH PERMANENT LOCK-ON FUNCTION, DTCV DIFFERENTIAL

摘要

The invention relates to a 4x4 traction system for cars. According to the invention, the system comprises a cardan put into motion by a car engine, by means of a gear box; the cardan drives, by means of some gear wheels (11), four continuously variable transmission systems with the same rotation speed; each of the four continuously variable transmission systems comprises two clutches (6) moving closer or apart the two halves of some input and output pulleys (8) and a belt (7) which transmits the rotation from one pulley (8) to the other one (8); the input pulley (8) rotates with the rotation speed received from the engine by means of the cardan, and the output pulley (8) drives some sun gears (13) on which there are some clutches (9) opening to some wheels (14) with zero adherence, while maintaining closed only the clutches (9) to the wheels (14) with good adherence which, in their turn, transmit the rotation to the wheels (14) with another rotation speed for each wheel (14), which is set by a car computer, depending on the ground conditions.